Transferring Electrical Energy Worksheet Page 42
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46(ii)
any two from:
•
less electricity needed / generated
•
fewer power stations needed
•
less coal is burned
do not accept coal is non-renewable / running out
answers in terms of fuel stocks neutral
•
less pollutant gases produced
accept named gases
accept harmful for pollutant
accept greenhouse gases
accept reduce / slow / stop global warming
accept reduces acid rain
2
(c)
joule
1
(d)
(i)
6800
accept £68 for 3 marks an answer of 68 gains 2 marks
allow 2 marks for correct substitution ie 400 × 17
allow 1 mark for obtaining 400
answers of 7480, 4760, 12920, 4080 gain 2 marks
3
(ii)
a small . . . . . . electricity
1
[10]
M17.
(a)
electrical
1
sound
correct order only
1
(b)
the energy transformed by the TV will be destroyed
1
(c)
a higher efficiency than
1
[4]
Page 42 of 46
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